A Lusby teenager was arrested Friday on charges including fourth-degree sex offense after he allegedly inappropriately touched a girl while riding home on the school bus.

Michael A. Moore, 18, was charged with second-degree assault, fourth-degree sex offense and molesting a student on a school vehicle.

He was released from the Calvert County Detention Center after bond was posted Friday.

At 9:06 p.m. April 11, Calvert County Sheriff’s Office deputies responded to a Lusby home for a report of a sexual assault, according to charging documents.

A Calvert High School student’s father told police his daughter had been sexually assaulted Feb. 9 by Moore, a student who rides to school on the bus with her.

The girl told police at 3 p.m. Feb. 9 she was riding home on the school bus when Moore approached her and allgedly inappropriately touched her. She said she told her father about the incident and it was “handled between the parents,” according to charging documents.

The father said he “did not want to involve law enforcement,” so he spoke with Moore’s parents, who “assured him that there would be no further incident,” charging documents state.

The girl told police she did not see Moore on the bus again until April 11 when he “began to harass her” and call her names, police said. She told her father, and he then spoke to Moore’s parents, but “he felt as though he was not getting satisfaction from speaking with them, so he contacted law enforcement,” according to charging documents.

A witness said Moore did inappropriately touch the girl and called her names and harassed her, police said.

Police said they spoke with Moore at his home that same day and Moore said the girl “wanted to tell him a secret and she was asking him to approach her closer.” Moore told police he was close to the girl while she was whispering to him but he did not touch her, charging documents state.